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高中阶段,使用打点计时器做学生分组实验就有三次,每次都得事先制取大量纸带(平均每个实验班300条),通常是一根根地剪,速度很慢。现介绍一种简易的快速制法(如图1): 首先,把纸带团芯子插入固定轴,纸带团两边插上栏杆(栏杆用粗铅丝弯制,插在预留孔中),以防止纸带从纸带团边缘散开。然后拉住纸带的一端,先绕两圈于特制的木质卡具上(图2),卡具两端留有∩形缺口,纸带正好卡在里面。操作时,
High school stage, the use of RBI timer student grouping experiments there are three times, each had to prepare a large number of paper tape (average of 300 each experimental class), usually a root cut, the speed is very slow. Now introduce a quick and easy method (Figure 1): First of all, insert the tape core into the fixed shaft, tape on both sides of the railing inserted (railings with thick lead wire bending, inserted in the reserved hole) To prevent the tape from spreading over the edges of the tape. Then pull one end of the tape, first around two laps on a special wooden fixture (Figure 2), left ∩-shaped notch at both ends of the fixture, the tape just stuck in it. When operating,